A display apparatus includes a display panel including a pixel to display an image based on input image data, a driving controller which determines a driving frequency of a first display area of the display panel to be a first driving frequency and determines a driving frequency of a second display area of the display panel to be a second driving frequency less than the first driving frequency when the first display area displays a moving image and the second display area of the display panel displays a still image, and an emission driver which outputs a moving image emission signal corresponding to the first driving frequency and a still image emission signal corresponding to the second driving frequency to the display panel. A width of a non-emission period of the still image emission signal is greater than a width of a non-emission period of the moving image emission signal.
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2. The display apparatus of claim 1, wherein when the display panel displays only the moving image or displays only the still image, the driving controller determines the driving frequency of the display panel to be a fixed driving frequency, and the emission driver outputs an emission signal having a constant width of a non-emission period to the display panel.
5. The display apparatus of claim 2, wherein the moving image emission signal and the still image emission signal are controlled based on an emission clock signal.
A display apparatus is designed to control the emission of moving and still images using an emission clock signal. The apparatus includes a display panel with a plurality of pixels, each pixel having a light-emitting element and a driving circuit. The driving circuit is configured to drive the light-emitting element based on a moving image emission signal and a still image emission signal. The emission clock signal synchronizes the timing of these signals to ensure proper display operation. The apparatus may also include a data driver to supply data signals to the pixels and a scan driver to control the driving circuits. The emission clock signal ensures that the moving and still image signals are emitted at the correct intervals, preventing flicker and maintaining image quality. This control mechanism is particularly useful in displays that alternate between moving and still images, such as in electronic paper or low-power display applications. The emission clock signal may be generated internally or externally and can be adjusted to optimize display performance based on the type of content being displayed. The apparatus may also include additional circuitry to process and distribute the emission clock signal to the relevant components.
6. The display apparatus of claim 5, wherein a width of an activation duration of the emission clock signal in the second driving frequency is greater than a width of an activation duration of the emission clock signal in the first driving frequency.
7. The display apparatus of claim 5, wherein the moving image emission signal and the still image emission signal are outputted in synchronization with a falling edge of the emission clock signal.
8. The display apparatus of claim 2, wherein the moving image emission signal and the still image emission signal are controlled based on a first emission start signal and a second emission start signal.
10. The display apparatus of claim 8, wherein positions of the first display area and the second display area are fixed on the display panel.
11. The display apparatus of claim 2, wherein the moving image emission signal and the still image emission signal are controlled by adjusting a width of an activation duration of an emission clock signal, an activation duration of a first emission start signal, and an activation duration of a second emission start signal.
16. The method of claim 13, wherein the moving image emission signal and the still image emission signal are controlled based on an emission clock signal.
17. The method of claim 13, wherein the moving image emission signal and the still image emission signal are controlled based on a first emission start signal and a second emission start signal.
18. The method of claim 13, wherein the moving image emission signal and the still image emission signal are controlled by adjusting a width of an activation duration of an emission clock signal, a width of an activation duration of a first emission start signal, and a width of an activation duration of a second emission start signal.
This invention relates to controlling emission signals in imaging systems, specifically for managing moving and still image capture. The problem addressed is the need for precise control over emission signals to optimize image quality and reduce power consumption in imaging devices. The invention provides a method to independently adjust the activation durations of an emission clock signal, a first emission start signal, and a second emission start signal. The emission clock signal determines the timing of emission pulses, while the first and second emission start signals control the initiation of emission for moving and still images, respectively. By varying the width of these activation durations, the system can dynamically adapt to different imaging scenarios, such as adjusting exposure times or reducing unnecessary emissions. This approach enhances flexibility in image capture, allowing for better synchronization between moving and still image emissions while minimizing energy waste. The method is particularly useful in applications requiring high-speed imaging or low-power operation, such as surveillance cameras, medical imaging, or consumer electronics. The precise control over emission timing improves image clarity and reduces artifacts, making it suitable for environments with varying lighting conditions or fast-moving subjects.
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May 24, 2021
October 18, 2022
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